Substitute for cranks.



A. J. JACOBSON.

SUBSTITUTE FOB ORANKS.

APPLIGATION FILED JUNE 29,1912.

Patented Feb. 25, 1913.

WITJvEssEs:

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UNITED STATES PATENT OFFICE.

ANDERS J". JACOBSON, 0F OSCEOLA, WISCONSIN, ASSIGNOR OF ONE-HALF T0 JOHNEKSTRAND, OF OSCEOLA, WISCONSIN.

SUBSTITUTE FOR CRANKS.

Specification of Letters Patent.

Patented Feb. 25, 1913.

Application filed June 29, 1912. Serial No. 706,641.

T) all whom it may concern lle it known that I, .hqonns J. Jaconsox, asuhject of the King of Sweden, who have declared my intention to heeomea citizen of thc l'nited States, residing at Osceola, in the couiity ofPolk and State of \Visconsin, have invented a new and useful Substitutefor Cranks, of which the following is a specification.

My invention relates to substitutes for cranks, and the object is toprovide a device by which either the end or any other part of a shaftmay receive rotary motion from a reciprotaited hody, and the same devicewill also convert the rotary motion of a driven shaft into reciprocatingmotion.

In the accompanying drawing ;Figure 1 is an end view of a shaft providedwith my device and a cylinder in diametrical section and a piston in thecylinder, with a piston rod connected with the device so as to eitheroperate or be operated by the shaft. Fig. 2 is the upper portion of Fig.l with the shaft and the parts fixed on it turned 90 degrees around.Fig. 3 is a side view of the upper part of Fig. 1 looking from left toright with a second disk added, so as to make the device steadier andstronger. Fig. 4 is an inner ed 'e view of the pitman shown to the leftin I ig. Fig. 5 is an outer edge view of the part shown in Fig. 4.

Referring to the drawing by reference numerals, 1 designates a shaft.say a line shaft in a factory for instance, and 2 is the cylindersecured on the floor 3 of the factory. In the cylinder is a pistonhaving a piston rod 5 with a cross-head 6 which is steadied hy guides 7fixed on the cylinder covet 8.

in a fork it of the cross-head are pivoted the lower ends of two flatpitmen 1O, '10, each of which has the inner edge provided with acam-shaped projection 11 having in the middle a notch 12 (hest shown inFig.

a .waidnotches are so arranged that each ofthem may receive. laterallyahout half the length of a hlock 13, which revolves on a pivot l tsecured in a tllSh 5. Said disk is l refcrahly made in halvcs andsecured on the shaft hy holts l through lugs 17. so that the disk may hesecured upon any part of a. shaft without removing the shaft from itshearings or disturhing pulleys already secured on the shaft. In Fig.hwhere two such disks arc employed the pivot l-l isl secured with oneend in each of them and the such rollers at hoth sides and the same studis extended through hoth of them, as shown in Figs. 3, i amt 5; and inFig. is shown that one roller 2t and one 21 are ready to enter thegroove of the second disk.

22 designates a combined fly-wheel and pulley fixed on the shaft 1.

In the operation of the device, if the shaft 1 is rotated by a belt (notshown) put on the pulley wheel 22 and the piston -t is that of a pump orother device in which reciprocatingmotion is desired, the rotation ofthe shaft and disks in either direction will cause the block 13 and thecrank pin 14: to act on one of the pitmen and impart say a downwardstroke to it. and as the block passes the lowest point (23 in Fig. 1) itpasses into the notch 12 of the other pitman, which has descended idle,and pulls that upward to the highest point and then engages thefirstactuated pitman and brings it downward, and so on the crank pin 14-and its hlock 13 act continuously pulling one pitman upward and theother downward. If the piston he drivcn 'hy steam, compressed air orother force and the shaft 1 is to receive rotary motion therefrom, thepitmen will act on the hlock -5 and the crank pin It and turn the diskor disks in which the crank pin is fixed and thcrchy the shaft. and thehywhccl 22 will carry the crank pin over the dead-ccnters '33 and theone diametrically opposite therefrom. The offset ll) in the groove 1h isto permit the guiding rollers 21. 21 to pass hcyond the crank pin duringeach half-stroke of the crank pin, as can he seen in Fig. 2. Saidguiding rollers 21, 21" not only guide the pitmen in their movements hutalso prevent them from leaving the hlock 13 until the latter is fullyrcccivcd hy the notch of the next pitman.

It is ohvioiis that while T have shown the disk, a crank pin fixed blockof the crank pin,

reciprocated parts as movable in vertical direction they may just aswell move in hori zontal or any other direction. Also that the devicemay be applied either to the end or .to any other part of the shaft andmay have either one or two of the grooved disks. The device isapplicable to pumping engines, wind mills and in a great many otherplaces, especially as a substitute for center cranks and eccentrics.

In Figs. 2 and 5 2a are screws in slots 25 for adjusting the upper partof portion 11 of each pitman when the block 13 wears.

What I claim is 2- 1. The combination with a shaft of a disk securedthereon and having at one side a concentric groove with a shortsemicircular curve toward the periphery of the at the center of thecurve, a block rotatable on the crank in, a reciprocal member, twopitmen pivote each with one end to said member, the other ends movingone at each side of the shaft and having each a notch adapted to receivethe block ofthe crank pin, and means on each pitman for engagement withthe groove of the disk so as to spread and close the pitmen and to holdeach of them alternately engaged with the block during one halfrevolution of the disk.

2. The combination with the shaft of. a disk secured thereon and havingat one side a concentric groove with a short semicircular curve towardthe periphery of the disk, a crank pin fixed at the center of the curve,a block r'otatableon the crank in, a reciprocal member, two pitmenpivote each with one end to said member, the other ends moving one ateach side of the shaft and having each a notch adapted to receive theand means on each pitman for engagement withthe groove of the disk so asto spread and close the pitmen and to hold each of them alternatelyengaged with the block during one half revolution of the disk, said diskbeing divided diametrically and having lugs and bolts therethrough forsecuring "it upon any part of the shaft. I 3. The combination with ashaft of a disk secured thereon and having at one side a concentricgroove with a short semicircular curve toward the periphery of the disk,a crank pin fixed at the center of the curve, a block rotatable on thecrank pin, a reciprocal member, two pitmen pivoted each with one end tosaid member, the other ends moving one at each side ofthe shaft andhaving each a not-ch adapted to receive the block of the crank pin, andmeans on each pitman for engagement with the groove of the disk so as tospread and close the pitmen and to hold each of the-m alternately en-'gaged with the block during one half revolution of the disk, and a flywheel fixed on the shaft.

4. The combination with a shaft of two disks secured thereon and havingtheir adjacent sides provided with corresponding concentric grooves,each with a segmental curve toward the periphery of the disk, acrank pinextending between the two disks at the center of the segmental curves, ablock ro tatable on the crank pin, a reciprocal member, two pitmenhaving each one end pivoted to said member, the other ends beingarranged between the disks one at each side of the shaft and providedeach with a notch adapted to receive the block of the crank pin andmeans on each pitman for engagement in the grooves of the disks, for thepurposes set forth.

5. The combination with the shaft, of a crank securable upon any part ofthe shaft intermediate the ends thereof, a reciprocal member adapted toeither receive or impart motion,'two pitmen extending from said memberand arranged at opposite sides of the shatf, each pitman havin at theside nearest the shaft a notch adapted to receive the crank pin andeither receive motion from it or impart motion to it during one halfturn of the crank, said crank being-disk-shaped and adjacent the pit-menprovided with a con-\ centric groove having at one point a seg mentalcurve toward the periphery qf the disk, and guiding means on the pitmenengaging in said groove.

In testimony whereof I aflix my signature, in presence of two witnesses.

ANDERS J. JACOBSON. Witnesses:

G. .F. Freeman, A. F. SOLOMONSON.

